Using appropriate checks in tests

Lib/test/test_peepholer.py

 import dis
 import re
 import sys
 from io import StringIO
 import unittest
 from math import copysign
 
 from test.bytecode_helper import BytecodeTestCase
 
 class TestTranforms(BytecodeTestCase):
@@ skipping 123 matching lines @@
             self.assertInBytecode(code, 'LOAD_CONST', elem)
 
         # Ensure that the resulting code actually works:
         def f(a):
             return a in {1, 2, 3}
 
         def g(a):
             return a not in {1, 2, 3}
 
         self.assertTrue(f(3))
-        self.assertTrue(not f(4))
+        self.assertFalse(f(4))
 
-        self.assertTrue(not g(3))
+        self.assertFalse(g(3))
         self.assertTrue(g(4))
 
 
     def test_folding_of_binops_on_constants(self):
         for line, elem in (
             ('a = 2+3+4', 9),                   # chained fold
             ('"@"*4', '@@@@'),                  # check string ops
             ('a="abc" + "def"', 'abcdef'),      # check string ops
             ('a = 3**4', 81),                   # binary power
             ('a = 3*4', 12),                    # binary multiply
@@ skipping 173 matching lines @@
         import gc
         counts = [None] * 5
         for i in range(len(counts)):
             support.run_unittest(*test_classes)
             gc.collect()
             counts[i] = sys.gettotalrefcount()
         print(counts)
 
 if __name__ == "__main__":
     test_main(verbose=True)